SLELO PRISM Partners FOR MORE INFORMATION Share These Goals: CONTACT:
PREVENTION St. Lawrence Eastern Lake Ontario What you Should Prevent the introduction of invasive species into Partnership for Regional Invasive the SLELO PRISM region. Know About Species Management EARLY DETECTION & RAPID RESPONSE SLELO PRISM Tench Detect new and recent invaders and rapidly re- C/O The Nature Conservancy spond to eliminate all individuals within a specific (Tinca tinca) area. (315) 387-3600 x 7725 COOPERATION www.sleloinvasives.org
Share resources, expertise, personnel, equipment, and information. Get Involved INFORMATION MANAGEMENT Report Invasive Species Observations at Collect, utilize, and share information regarding surveys, infestations, control methods, monitor- www. imapinvasives.org ing, and research.
CONTROL Join our invasive species Volunteer Sur- Control invasive species infestations by using veillance Network (VSN). best management practices, methods and tech- niques to include: For details, contact [email protected] ERADICATION - Eliminate all individuals and the seed bank from an area. CONTAINMENT - Reduce the spread of established Join our listserv and get notifications for infestations. SUPPRESSION - Reduce the density but not necessarily upcoming trainings and workshops. the total infested area.
RESTORATION To join follow these steps: Develop and implement effective restoration • methods for areas that have been degraded by Email [email protected] invasive species and where suppression or control • Type “join” in subject space has taken place. • Send a blank email body EDUCATION / OUTREACH Increase public awareness and understanding of invasive species issues through volunteer moni- SLELO PRISM toring, citizen science and community outreach. Photo Credits: Cover photo: Midwest Invasive Species Information “Teaming up to stop the Network, https://www.misin.msu.edu/facts/detail/? spread of project=&id=340&cname=Tench. Tench ID photo credit: http:// invasive species” www.hlasek.com/tinca_tinca1de.html. Cited Resources: (1) On- tario’s Invasive Species Awareness Program, http:// www.invadingspecies.com/tench/. (2) Great Lakes Connection, http://ijc.org/greatlakesconnection/en/tag/tench/ . What are Tench? Steps you can Take to Stop the Tench Identification:
Spread of Tench: Size: Tench can group up to 18 inches in length Tench (Tinca tinca) are an invasive fish native to and weight up to 10-12 pounds. Europe and Western Asia. They are a member of the minnow/carp family Cyprinidae and were in- You can help stop their spread by learning troduced to the U.S. as a food and sport fish. how to recognize Tench and keeping an eye out for this fish. Search for Tench in the St. Tench was illegally introduced to the Richelieu Lawrence River between Cape Vincent and River, a tributary of the St. Lawrence River, by an Massena, NY. Pay special attention to waterbod- unlicensed fish farm in the 1980’s. It is currently ies near farming ponds. Golden colored Tench found in the Columbia watershed in British Co- varieties are popular aquarium species. lumbia, and is well established in the U.S. Missis- sippi River Watershed. There is concern Tench Do not use Tench as bait. Never release un- may spread to the St. Lawrence River and eventu- wanted pets or dump unused bait into water- Color/Description: Tench have dark rounded ally to Lake Ontario and other Great Lakes (1). ways, doing so may spread invasive species. fins with olive to pale golden coloring and a white bronzy belly and bright red/orange eyes. Tench inhabit weedy/muddy water bottoms. They have a terminal mouth with a barbel at They have high reproductive rates, long lifespans and can survive in low-oxygen environments. They are generalist predators whose diet includes fish eggs, snails and other benthic invertebrates which puts them in direct competition with many native fish species. Tench have the ability to di- minish aquatic food-webs, increase water turbidi- ty, and introduce non-native parasites into the Great Lakes (2). Early detection of Tench is key to preventing their spread into the Great Lakes ba- If You Think You Have Found sin. Tench: • Note your location. Below is a photo of a Tench in its juvenile • Don’t release the specimen, put it on ice. stage. Do not use Tench as bait. • Take close-up photos of the specimen. • Notify SLELO PRISM at 315-387-3600 (x 7725)